/**
 * <pre>
   Copyright 2016 aaron.sd

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
 * </pre>
 * 
 * @author aaronwong.sd@foxmail.com
 * @version 下午8:49:51
 */
package com.iwechat.service;

import java.util.List;

import com.iwechat.mybatis.generator.model.TemplateMessage;

/**
 * 互斥消息扫描接口
 * 
 * @author aaronwong.sd@foxmail.com
 */
public interface MutexDbScan {

    /**
     * 该方法实现需要利用事务一致性,在读操作的“读数据”前增加“写数据的锁”
     * 
     * @return 待发消息
     */
    List<TemplateMessage> scanDb();
}
